This Immortal Is Super Nerdy but Too Invincible

Lin Xiao, a social animal, died suddenly while working overtime. His soul traveled through the world of immortality and gained the system of "becoming stronger while lying flat". As long as you stay around, fish, and play tricks, you can upgrade infinitely. From then on, there was an omnipotent salted fish in the world of immortality. He pursues others' hard training, orders takeaways when they venture into secret realms, uses "Retreat! Retreat! Retreat!" To repel inner demons, and uses "spiritual internal friction" to bring down the catastrophe. When he was forced to leave the mountain, he just wanted to say: "I really just want to lie down!"